# Extraembryonic membranes


Permanent URL: [http://purl.obolibrary.org/obo/uberon/references/reference_0000010](http://purl.obolibrary.org/obo/uberon/references/reference_0000010)

Status: [initial draft](http://purl.org/spar/pso/initial-draft)

Authors and contributors:

 * Chris Mungall (author)

Date: 2012

Document Type: biological_modeling

## Abstract
...


Table 5.4 from Kardong:

    | Group      | `Amnion`      | Chorion       | Allantois | Yolk Sac | Respiratory membrane |
    |------------+---------------+---------------+-----------+----------+----------------------|
    | Birds      | Ec, SomM      | Ec, SomM      | En, SplM  | En, SplM | Ch, A                |
    | Reptiles   | Ec, SomM      | Ec, SomM      | En, SplM  | En, SplM | Ch, A                |
    | Monotremes | Ec, SomM      | Ec, SomM      | En, SplM  | En, SplM | Ch, A                |
    | Marsupials | Ec, SomM      | Ec, SomM      | En, SplM  | En, SplM | Ch, splpl            |
    | Placentals | Ec (tr), SomM | Ec (tr), SomM | En, SplM  | En, SplM | Ch, A                |

 * Ec = Ectoderm
 * SomM = Somatic mesoderm
 * SplM = Splanchnic mesoderm
 * Ch = Chorion
 * A = Allantois
 * splpl = Splanchnopleure

## Sources:
 * Kardong